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Candida colonization

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https://www.readbyqxmd.com/read/28098529/multidrug-resistant-candida-haemulonii-and-c-auris-tel-aviv-israel
#1
Ronen Ben-Ami, Judith Berman, Ana Novikov, Edna Bash, Yael Shachor-Meyouhas, Shiri Zakin, Yasmin Maor, Jalal Tarabia, Vered Schechner, Amos Adler, Talya Finn
Candida auris and C. haemulonii are closely related, multidrug-resistant emerging fungal pathogens that are not readily distinguishable with phenotypic assays. We studied C. auris and C. haemulonii clinical isolates from 2 hospitals in central Israel. C. auris was isolated in 5 patients with nosocomial bloodstream infection, and C. haemulonii was found as a colonizer of leg wounds at a peripheral vascular disease clinic. Liberal use of topical miconazole and close contact among patients were implicated in C...
February 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28076372/bad-to-the-bone-on-in-vitro-and-ex-vivo-microbial-biofilm-ability-to-directly-destroy-colonized-bone-surfaces-without-participation-of-host-immunity-or-osteoclastogenesis
#2
Adam Junka, Patrycja Szymczyk, Grzegorz Ziółkowski, Ewa Karuga-Kuzniewska, Danuta Smutnicka, Iwona Bil-Lula, Marzenna Bartoszewicz, Susan Mahabady, Parish Paymon Sedghizadeh
Bone infections are a significant public health burden associated with morbidity and mortality in patients. Microbial biofilm pathogens are the causative agents in chronic osteomyelitis. Research on the pathogenesis of osteomyelitis has focused on indirect bone destruction by host immune cells and cytokines secondary to microbial insult. Direct bone resorption by biofilm pathogens has not yet been seriously considered. In this study, common osteomyelitis pathogens (Staphylococcus aureus, Pseudomonas aeruginosa, Candida albicans, and Streptococcus mutans) were grown as biofilms in multiple in vitro and ex vivo experiments to analyze quantitative and qualitative aspects of bone destruction during infection...
2017: PloS One
https://www.readbyqxmd.com/read/28068844/hierarchical-cluster-analysis-and-chemical-characterisation-of-myrtus-communis-l-essential-oil-from-yemen-region-and-its-antimicrobial-antioxidant-and-anti-colorectal-adenocarcinoma-properties
#3
Sirajudheen Anwar, Rebecca A Crouch, Nasser A Awadh Ali, Mohamed A Al-Fatimi, William N Setzer, Ludger Wessjohann
The hydrodistilled essential oil obtained from the dried leaves of Myrtus communis, collected in Yemen, was analysed by GC-MS. Forty-one compounds were identified, representing 96.3% of the total oil. The major constituents of essential oil were oxygenated monoterpenoids (87.1%), linalool (29.1%), 1,8-cineole (18.4%), α-terpineol (10.8%), geraniol (7.3%) and linalyl acetate (7.4%). The essential oil was assessed for its antimicrobial activity using a disc diffusion assay and resulted in moderate to potent antibacterial and antifungal activities targeting mainly Bacillus subtilis, Staphylococcus aureus and Candida albicans...
January 9, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28068390/effect-of-inulin-on-proteome-changes-induced-by-pathogenic-lipopolysaccharide-in-human-colon
#4
Michele Pier Luca Guarino, Annamaria Altomare, Simone Barera, Vittoria Locato, Silvia Cocca, Cinzia Franchin, Giorgio Arrigoni, Candida Vannini, Sarah Grossi, Paola Campomenosi, Valentina Pasqualetti, Marcella Bracale, Rossana Alloni, Laura De Gara, Michele Cicala
In the present study, the protective role of inulin against lipopolysaccharide (LPS)-induced oxidative stress was evaluated on human colonic mucosa using a proteomic approach. Human colonic mucosa and submucosa were sealed between two chambers, with the luminal side facing upwards and overlaid with Krebs (control), LPS or LPS+ inulin IQ solution. The solutions on the submucosal side (undernatants) were collected following 30 min of mucosal exposure. iTRAQ based analysis was used to analyze the total soluble proteomes from human colonic mucosa and submucosa treated with different undernatants...
2017: PloS One
https://www.readbyqxmd.com/read/28066812/the-denture-associated-oral-microbiome-in-health-and-stomatitis
#5
Baochen Shi, Tingxi Wu, Jeffrey McLean, Anna Edlund, Youngik Young, Xuesong He, Hongyang Lv, Xuedong Zhou, Wenyuan Shi, Huiying Li, Renate Lux
While investigation of the microbiome on natural oral surfaces has generated a wealth of information, few studies have examined the microbial communities colonizing dentures and their relationship to oral health. To address this knowledge gap, we characterized the bacterial community associated with dentures and remaining teeth in healthy individuals and patients with denture stomatitis. The microbiome compositions of matched denture and tooth plaque samples of 10 healthy individuals and 9 stomatitis patients were determined by 16S rRNA gene pyrosequencing...
November 2016: MSphere
https://www.readbyqxmd.com/read/28058136/appropriate-treatment-of-invasive-candidiasis-in-icu-timing-colonization-index-candida-score-biomarkers-towards-de-escalation
#6
Francesco Giuseppe De Rosa, Silvia Corcione, Giorgia Montrucchio, Luca Brazzi, Giovanni Di Perri
No abstract text is available yet for this article.
December 2016: Turkish Journal of Anaesthesiology and Reanimation
https://www.readbyqxmd.com/read/28018842/c-dubliniensis-in-an-immunocompetent-patient-with-metal-lingual-frenulum-piercing
#7
Gary Ventolini, Peihsuan Tsai, Lee David Moore
Candida spp. are opportunistic unicellular fungi, known to cause oral, vaginal, lung and occasionally systemic infections. Characteristically, they colonize the oral cavity, the mucosal surfaces of the cheek, palate, and tongue. Usually harmless, oral Candidas may become pathogenic under immunosuppressive conditions, dentures presence, or salivary flow impairment. Accurate species identification is important because C. dubliniensis can rapidly develop fluconazole resistance. We report C. dubliniensis in an immunocompetent patient with a metal lingual frenulum piercing...
December 2016: Medical Mycology Case Reports
https://www.readbyqxmd.com/read/27999492/evaluation-of-denture-related-factors-predisposing-to-denture-stomatitis-in-a-lebanese-population
#8
Georges Aoun, Antoine Cassia
BACKGROUND: Denture stomatitis is a common fungal oral infection of multifactorial etiology. Denture-related factors such as denture's age, hygiene, night wearing and colonization by Candida albicans are known to predispose to denture stomatitis. The aim of this study was to evaluate these factors and their relationship with the occurrence of denture stomatitis in a Lebanese population. MATERIAL AND METHODS: Sixty patients (40 women, 20 men; age range 40-80 years) showing clinical evidence of denture-related stomatitis were selected for this study...
October 2016: Materia Socio-medica
https://www.readbyqxmd.com/read/27996940/allergic-fungal-airway-disease
#9
REVIEW
E M Rick, K Woolnough, C H Pashley, A J Wardlaw
Fungi are ubiquitous and form their own kingdom. Up to 80 genera of fungi have been linked to type I allergic disease, and yet, commercial reagents to test for sensitization are available for relatively few species. In terms of asthma, it is important to distinguish between species unable to grow at body temperature and those that can (thermotolerant) and thereby have the potential to colonize the respiratory tract. The former, which include the commonly studied Alternaria and Cladosporium genera, can act as aeroallergens whose clinical effects are predictably related to exposure levels...
2016: Journal of Investigational Allergology & Clinical Immunology
https://www.readbyqxmd.com/read/27989711/oral-health-status-in-patients-with-acquired-brain-injury-a-systematic-review
#10
REVIEW
Mohit Kothari, Rajath Sasidharan Pillai, Simple Futarmal Kothari, Rubens Spin-Neto, Abhishek Kumar, Jørgen Feldbæk Nielsen
OBJECTIVE: To undertake a systematic review of the current knowledge and future perspectives regarding the status of various oral health factors, including social and behavioral aspects, in patients with acquired brain injury (ABI). STUDY DESIGN: A structured search strategy was applied to PubMed, Embase, and Scopus electronic databases until January 2016 to identify studies presenting assessments of the oral health status of patients afflicted with any kind of ABI...
November 11, 2016: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/27965724/enterogenous-infection-of-candida-albicans-in-immunocompromised-rats-under-severe-acute-pancreatitis
#11
Xiang-Wang Zhao, Lei Yan, Dan Xu, Yu-Hui Cui, Chun-Hui Yang, Yan-Jun Zhou, Jian-Guo Tang
BACKGROUND: Opportunistic infection of Candida albicans (C. albicans) has become a serious problem in immunocompromised patients. The study aimed to explore the mechanism of enterogenous infection of C. albicans in immunocompromised rats under severe acute pancreatitis (SAP). METHODS: Sprague Dawley (SD) rats (n=100) were randomly assigned into 5 groups as the following: blank group, cyclophosphamide+ceftriaxone+SAP group, cyclophosphamide+ceftriaxone group, cyclophosphamide+SAP group, and cyclophosphamide group...
2016: World Journal of Emergency Medicine
https://www.readbyqxmd.com/read/27960572/a-sensitive-and-a-rapid-multiplex-polymerase-chain-reaction-for-the-identification-of-candida-species-in-concentrated-oral-rinse-specimens-in-patients-with-diabetes
#12
Asanga Sampath, Manjula Weerasekera, Chinthika Gunasekara, Ayomi Dilhari, Uditha Bulugahapitiya, Neluka Fernando
OBJECTIVES: Oral candidiasis is being frequently recognized in patients with diabetes, and is associated with multiple pathogens including Candida albicans, Candida parapsilosis, Candida glabrata and Candida tropicalis. The aim of this study was to evaluate a usefulness of a Multiplex Polymerase Chain Reaction as a rapid diagnostic tool for identification of four oral Candida pathogens in patients with diabetes. MATERIALS AND METHODS: A multiplex PCR was optimized to identify four Candida species in concentrated oral rinse samples...
March 2017: Acta Odontologica Scandinavica
https://www.readbyqxmd.com/read/27941860/lactate-signalling-regulates-fungal-%C3%AE-glucan-masking-and-immune-evasion
#13
Elizabeth R Ballou, Gabriela M Avelar, Delma S Childers, Joanna Mackie, Judith M Bain, Jeanette Wagener, Stavroula L Kastora, Mirela D Panea, Sarah E Hardison, Louise A Walker, Lars P Erwig, Carol A Munro, Neil A R Gow, Gordon D Brown, Donna M MacCallum, Alistair J P Brown
As they proliferate, fungi expose antigens at their cell surface that are potent stimulators of the innate immune response, and yet the commensal fungus Candida albicans is able to colonize immuno competent individuals. We show that C. albicans may evade immune detection by presenting a moving immunological target. We report that the exposure of β-glucan, a key pathogen-associated molecular pattern (PAMP) located at the cell surface of C. albicans and other pathogenic Candida species, is modulated in response to changes in the carbon source...
December 12, 2016: Nature Microbiology
https://www.readbyqxmd.com/read/27935838/the-paralogous-histone-deacetylases-rpd3-and-rpd31-play-opposing-roles-in-regulating-the-white-opaque-switch-in-the-fungal-pathogen-candida-albicans
#14
Jing Xie, Sabrina Jenull, Michael Tscherner, Karl Kuchler
: Chromatin modifications affect gene regulation in response to environmental stimuli in numerous biological processes. For example, N-acetyl-glucosamine and CO2 induce a morphogenetic conversion between white (W) and opaque (O) cells in MTL (mating-type locus) homozygous and heterozygous ( A: /α) strains of the human fungal pathogen Candida albicans Here, we identify 8 histone-modifying enzymes playing distinct roles in the regulation of W/O switching in MTL homozygous and heterozygous strains...
November 15, 2016: MBio
https://www.readbyqxmd.com/read/27932543/members-of-the-zinc-cluster-factor-family-alters-virulence-in-candida-albicans
#15
Luca Issi, Rhys A Farrer, Kelly Pastor, Benjamin Landry, Toni Delorey, George W Bell, Dawn A Thompson, Christina A Cuomo, Reeta P Rao
Virtually all humans are colonized with Candida albicans However, in immunocompromised individuals this benign commensal organism becomes a serious, life-threatening pathogen. Here, we describe and analyze the regulatory networks that modulate innate responses in the host niches. We identified Zcf15 and Zcf29, two Zinc Cluster transcription Factors (ZCF) that are required for C. albicans virulence. Previous sequence analysis of clinical C. albicans isolates from immunocompromised patients indicates that both ZCF genes diverged during clonal evolution...
December 7, 2016: Genetics
https://www.readbyqxmd.com/read/27924594/adhesion-of-yeast-and-bacteria-to-oral-surfaces
#16
Richard D Cannon, Karl M Lyons, Kenneth Chong, Kathryn Newsham-West, Kyoko Niimi, Ann R Holmes
Colonization of surfaces in the human body by microorganisms is an early, essential, step in the initiation of infectious disease. We have developed in vitro assays to investigate interactions between yeast or bacterial cells and human tissues, fluids, or prostheses. Such assays can be used to identify the adhesins, ligands, and receptors involved in these interactions, for example, by determining which components of the microbe or human tissue/fluid interfere with adherence in the assay. The assays can also be applied to finding ways of preventing adhesion, and subsequent disease, by investigating the effects of different conditions and added compounds on adherence in the in vitro assays...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27916878/burkholderia-contaminans-colonization-from-contaminated-liquid-docusate-colace-in-a-immunocompetent-adult-with-legionnaire-s-disease-infection-control-implications-and-the-potential-role-of-candida-pellucosa
#17
Burke A Cunha, John Gian, Bertamaria Dieguez, Elsa Santos-Cruz, Daniela Matassa, Steve Gerson, Pat Daniels, Carlos Rosales, Rodger P Silletti
Objective:B. contaminans was cultured from respiratory secretions and liquid docusate (Colace) in a Neurosurgical Intensive Care Unit (NICU) patient with community-acquired Legionnaire's disease but not from another bottle given to the patient. Unexpectedly, C. pelliculosa was cultured from two bottles, but not the B. contaminans bottle or respiratory secretions. Methods:B. cepacia, later identified as B. contaminans, was cultured from a bottle of liquid docusate (Colace) dispensed to a non-cystic fibrosis patient...
November 30, 2016: Journal of Clinical Medicine
https://www.readbyqxmd.com/read/27915298/multilocus-sequence-typing-mlst-analysis-of-candida-albicans-isolates-colonizing-acrylic-dentures-before-and-after-denture-replacement
#18
Khai How Choo, Hee Ji Lee, Nicholas J Knight, Ann R Holmes, Richard D Cannon
Yeast, in particular Candida albicans, are the principal fungal cause of denture stomatitis, and can also be present as a commensal in many individuals. Few studies, however, have examined oral retention of yeast strains over time. We analyzed the yeast present in saliva samples and from the dentures of 10 individuals colonized with yeast but with no signs of stomatitis, before new complete maxillary dentures were fitted and also at 1, 3, and 6 months after denture replacement. Yeast species were presumptively identified on selective agar plates and were present in nine individuals before denture replacement and in six at the 6-month time point...
December 2, 2016: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/27891466/an-in-vitro-evaluation-of-retention-colonization-and-penetration-of-commonly-used-denture-lining-materials-by-candida-albicans
#19
Sushma Krishnamurthy, Rajendra B Hallikerimath
INTRODUCTION: Colonization of the surface by Candida albicans and related Candida species is one of the major concerns of denture lining materials. AIM: We evaluated retention, colonization and penetration of the four denture lining materials namely Molloplast B, Permaflex, GC Soft Liner and Ufi Gel Hard C by Candida albicans. MATERIAL AND METHODS: a) Evaluation of retention: Five test discs of each material with smooth surface on one side and rough on the other were prepared and surface roughness (Ra) was measured with profilometer...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27889166/taggiasca-extra-virgin-olive-oil-colonization-by-yeasts-during-the-extraction-process
#20
G Ciafardini, G Cioccia, B A Zullo
The opalescent appearance of the newly produced olive oil is due to the presence of solid particles and microdrops of vegetation water in which the microorganisms from the olives' carposphere are trapped. Present research has demonstrated that the microbiota of the fresh extracted olive oil, produced in the mills, is mainly composed of yeasts and to a lesser extent of molds. The close link between the composition of the microbiota of the olives' carposphere undergoing to processing, and that of the microbiota of the newly produced olive oil, concerns only the yeasts and molds, given that the bacterial component is by and large destroyed mainly in the kneaded paste during the malaxation process...
April 2017: Food Microbiology
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